#include "stm32f10x.h"
#include "stm32f10x_usart.h"

void RCC_Configuration(void);
void GPIO_Configuration(void);
void USART_Configuration(void);

int main(void)
{
	vu16 i=0;
	RCC_Configuration();
	GPIO_Configuration();
	USART_Configuration();
	while(1)
	{
		if(USART_GetFlagStatus(USART1,USART_IT_RXNE)==SET)
		{
			USART_SendData(USART1,USART_ReceiveData(USART1));
			for(i=0;i<500;i++);
		}
	}
}

void RCC_Configuration(void)
{
	ErrorStatus HSEStartUpStatus;
	RCC_DeInit();
	RCC_HSEConfig(RCC_HSE_ON);
	HSEStartUpStatus = RCC_WaitForHSEStartUp();
	if(HSEStartUpStatus == SUCCESS)
	{
		RCC_HCLKConfig(RCC_SYSCLK_Div1);
		RCC_PCLK2Config(RCC_HCLK_Div1);
		RCC_PCLK2Config(RCC_HCLK_Div2);
		FLASH_SetLatency(FLASH_Latency_2);
		FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
		RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9);
		RCC_PLLCmd(ENABLE);
		while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
		RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
		while(RCC_GetSYSCLKSource() != 0x08);
	}
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA,ENABLE);
}

void GPIO_Configuration(void)
{
	GPIO_InitTypeDef GPIO_InitStructure;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA,&GPIO_InitStructure);
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	GPIO_Init(GPIOA,&GPIO_InitStructure);
}

void USART_Configuration(void)
{
	USART_InitTypeDef USART_InitStructure;
	USART_InitStructure.USART_BaudRate = 9600;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;
	USART_InitStructure.USART_StopBits = USART_StopBits_1;
	USART_InitStructure.USART_Parity = USART_Parity_No;
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
	USART_Init(USART1,&USART_InitStructure);
	USART_Cmd(USART1,ENABLE);
}

